Sharpener for grinder knives



10 1927. I May E. e. CHERMAK ET AL SHARPENER FOR GRINDER KNIVES I File'd Oct. 2a, 1926 fl lk Patented May 10, 1927.

UNITED stares PikTEINT QFFICE.

EIMIL G. CHER/MAX. AND FRANK S. PRITZL, OF MANITOWOC, WISCONSIN.

SHARPENER FOR GRINDER KNIVES.

Application filed October 28, 1926. Serial No. 1445836.

This invention relates to sharpeners for knives or ap'ertured disks of meat grinders, and ms for an object the provision of novel means whereby a sharpening instrumentality' may be applied to a meat grinder in order that said sharpener will be driven through the power employed for operating the grinder: and it is furthermore an object of the invention to provide a sharpener of the character indicated which may be anchored to the meat grinder in the same way as the grinding knife or disk is held in the meat grinder.

it is a further object of this invention to provide a sharpener for knives or aperture-d disks of meat grinders, effective to dress or abrade the side of the said knife or disk uniforn'ily. the said device having novel means for holding the instrumentalities in operative relation while the shapening device is being driven.

With the foregoing and otherobjects in view, the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

in describing the invention in detail, reference will be had to the accompanying drawings forming part of this application wherein like characters denote corresponding parts in the several views, and in which- Figure 1 illustrates a view in elevation of a sharpening device embodying the invention applied to a conventional type of meat grinder; and

Figure 2 illustrates a sectional view on the line 22 of Fig. 1.

In these drawings, 5 denotes the casing of a conventional type of grinder and 6 the ring nut therefor employed for holding the knife or disk in operative relation to the feeding means for delivering the material to the knife or disk.

It is the purpose of the inventors that the sharpening mechanism shall be substituted for the knife of a meat grinder and that it shall be held in operative relation to the feed worm shaft in order that it will take motion from the said shaft and operate an abrading wheel for sharpening the knife or disk of the grinder.

In carrying the invention into practice, a bracket 7 is provided with a bearing 8 in which a shaft v9 is rotatable and the said shaft is provided with an abrading wheel it), such as a grindstone or emery wheel, wh ch will prove etficlent to dress the'surface ot an apertured disk 11, such as is employed in meat grinders.

The bearing 8 has an external flange 12 at its inner end and this flange is of a diameter and size to fit in the seat of a meat grinder usually "COUPE-3d by a disk such as 11, and the bearing is held inplace by a ring nut, suchas 6. The inner end of the shaft 9 is provided with a recess whose Walls conform to the configuration of the end of the sh 1 ft 13 of the feed worm of the grinder, and it is the purpose of the inventors that as the "teed worm is rotated, rotary motion will be communicated therefrom to the shaft 9 in that the abrading wheel may be rotates The outer end of the, bracket has an angularly disposed and apertured boss 14, through which a rod or shaft 15 extends and in which it is adjustable. It is held at dif ferent positions of adjustment by a set screw it? threaded in the boss and adapted to bear against the said rod. The inner end of the rod constitutes a support on which the disk ll may rotate in contact with the abrading wheel, and it is the purpose of the inventors that the said disk 11 shall be forced into engagement with the wheel and be maintained in such engagement while the sharpening action is taking place. To the end just stated. a stationary flange 17 is provided on the rod 15 and it constitutes an anchorage and abutment for a spring 18 that encircles the shaft. The opposite end of the spring is connected to or abuts a follower 19 which is loose on the rod 15 and which is urged into engagement with the hub 20 of the disk 11, thus causing the disk to be held against the abrading wheel while it is rotated.

The relation of parts is such that as the abrading wheel is rotated, the disk also rotates on the rod and thus the side of the disk being dressed is uniformly treated in order inner end of the said rod being in proximity to the abrading Wheel and adapted to rotatahly support grinding disk, and means for urging the disk into engagement with the ahrading wheel.

52. In a sharpener for grinder knives, a hearing l'iaving a flange adapted to he clamped on ,e'rinder, a shaft rotatable in the bearing and having connection with the shaft of a teed Worm of a grinder, an ahrading Wheel on the outer end of the shaft, a bracket tori'i'ied as a part of the hearing, said hracket having an angularlv disposed apertured boss, a rod adjustable therein, the inner end of the said rod beingin proximity to the ahrading Wheel and aeaoted to rotatably support a grinding disk, a stationary abutment on the rod, a follower loosely applied to the rod, and operative to hold a grinding disk in en genient with the abrading Wheel, and a spring interposed between the abutment and the follower.

3. In a sharpener for grinder knives, a hearing, means for securing; it to a grinder, a shaft rotatable in the hearing and having connection with the shaft ot a feed worm of a grinder, an abrading Wheel on the outer end oi the shaft, a bracket suspended from the hearing, said bracket having an angularly disposed apertured boss, a rod adjustable therein, the inner end of the said EO l heing in proximity to the ahrading Wheel and adapted to rotatahly support a grinding (halt, a stationary abutment on the rod, a lellower loosely applied to the rod and 0p era-tire to hold a grinding disk in engage ment with the ahrading Wheeh-and a spring interposed between the abutment and the follower.

In a sharpener :t'or grinder knives, a hearing, means 'or securing it to a grinder, a shaft rotatable in the hearing and having connection with the shaft of a feed worm of a grinder, an ahrading Wheel on the outer end of the shaft, a bracket suspended tiorn the hearing, said bracket having an angularly disposed apertured boss, a rod adjustable therein, the inner end of the said d being in proximity to the ahrading wheel and adapted to rotatahly support a grinding disk, and yieldable means for urg- Eng); the disk toward the Wheel.

EMIL (l. CHERMAK. FRANK S. PRITZL. 

